Figure 2.

Inbreeding depression of egg-to-adult viability in replicate N10 (n=10) and N50 (n=6) populations at a range of stress levels. Stress level for medium i was calculated as 1−(fitted survival_{N500 (medium i)}/fitted survival_{N500 (medium 1)}). Replicate N10 populations display a steep initial increase in inbreeding depression; however, at high stress levels the rate of increase decreases. Replicate N50 populations show a different norm of reaction, but with large differences between replicate populations. Two replicate N10 populations reached a survival of zero, as indicated with ‘+' for each replicate population.